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Large language models are trained on data snapshots that can lag years behind reality, and unlike a search index, a model's internal memory doesn't automatically refresh when a business changes its name, moves address, changes ownership, or updates its founding story. This produces a specific, damaging failure mode: a prospect asks an AI assistant about a company and gets a confidently stated but outdated timeline, sometimes referencing a former name or a divested subsidiary as if it were still current. Correcting this requires publishing explicit, dated corrections — updated JSON-LD with foundingDate and name history, a clear statement of the current legal name and any prior names, and citations on high-authority pages that state the correction plainly rather than assuming visitors already know. Because models weigh recency and corroboration, repeated, consistent, dated restatements of the current facts across multiple citations gradually override the stale version.
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No single-vendor mechanism exists to edit a model's trained memory directly. The reliable path is publishing consistent, dated, corroborated facts across owned pages and third-party citations so future training and retrieval increasingly favor the current version over the stale one.
Each model has a different training cutoff and different retrieval behavior — some rely more on live web retrieval and pick up recent citations quickly, while others lean on frozen training data that only updates on the next full retrain.
Legal or trading name changes should come first, since nearly every other fact — address, ownership, service claims — gets misattributed if the model is still anchored to the wrong entity name in the first place.
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